Misha Wolf scripsit:

> This:
> http://www.iptc.org/docs/newscodes.html#123456
> is not legal, as "123456" is an illegal fragment identifier.

Not exactly. We can decompose this into three claims, two false
and one true.

1) "123456" is an invalid fragment: false. If you look at the
syntax rules in RFC 3986, you see that every character in a fragment
can be a digit.

2) "123456" can't be the value of an XML attribute of type ID: false.
An XML document may contain attributes of type ID in one of two
ways: every attribute with the name "xml:id" is of type ID, and so
is any attribute declared in the DTD (internal or external) to have
type ID. Such attributes may contain any value, and the document is
well-formed.

3) "123456" can't be the value of an attribute of type ID in a
*valid* XML document: true. However, plenty of documents are not
valid: in particular, any document without a DTD is not valid, and
there is nothing wrong with having a DTD without expecting or requiring
validity.

--
John Cowan cowan@...
"Not to know The Smiths is not to know K.X.U." --K.X.U.